mc_listSegmentMembers

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, and the description is extremely minimal. It does not disclose whether the operation is read-only, what authentication is needed, or any side effects. The burden is fully on the description, which fails to provide any behavioral context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is very short (4 words) but lacks structure and valuable content. It does not include any context, usage notes, or examples. Conciseness should not sacrifice informativeness; here it is under-specified.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With no output schema, no annotations, and a minimal description, the tool is incomplete. It does not explain return values, pagination behavior, or error conditions. For a listing tool with 4 parameters (including pagination), much more context is needed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% (all 4 parameters have descriptions in the input schema). The description adds no additional meaning beyond what the schema already provides. According to guidelines, baseline is 3 for high coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'List members in segment' clearly states the verb 'List' and the resource 'members in segment', distinguishing it from siblings like mc_listMembers (lists all members) and mc_listSegments (lists segments). However, it lacks specificity about what 'members' refers to (e.g., subscribers or contacts).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives. The sibling tools include many list operations, but there is no indication of prerequisites, filters, or exclusions that would help an agent decide which tool to invoke.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.